Method of and apparatus for measuring the thickness of objects

Radiant energy – Invisible radiant energy responsive electric signalling – With means to inspect passive solid objects

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250336, G01J 100

Patent

active

039537366

ABSTRACT:
Disclosed is a method of and an apparatus for measuring the thickness of an object, usually a metal strip, by using a radiation beam and digital techniques and, more generally, a method of linearization of an exponential function which can be advantageously implemented by digital techniques. First, a counter is preset to a count corresponding to a predetermined magnitude of a value to be linearized. Then, a sequence of pulses whose number is representative of the value to be linearized is generated. The pulses of this sequence are counted so as to generate a signal each time the number of pulses counted corresponds to a standard value unit. Each signal so generated is used to modify by a predetermined count the count of the preset counter whereby, at the end of the sequence, the contents of the preset counter is representative of the value to be linearized.

REFERENCES:
patent: 2922888 (1960-01-01), Faukner
patent: 3612876 (1971-12-01), Grant

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